RESEARCH OF INFLUENCE OF DESIGN DATA ON AN OVERALL PERFORMANCE OF COAXIAL HEAT EXCHANGERS

Abstract

In work results of research of influence of design data on an overall performance of coaxial heat exchangers are resulted. The carried out experime ntal and theoretical researches have revealed, that the increase in a backlash and temperature  of  a  cooling  liquid  leads  to  growth  of  final  temperature  of  a cooled liquid. The frequency rate increase leads to decrease in temperature of a  cooled  liquid.  Dependence  of  hydraulic  resistance  on  backlash  size  has strongly pronounced return character. Dependence of hydraulic resistance on frequency  rate of  giving  linear, correlation between these  variables the positive. The received equations of regress have allowed to define optimum parametres of work. At desirable size of final temperature 4 °С  –  a backlash between pipes of 2,3 mm, frequency rate of a cooling liquid 4, temperature of a cooling  liquid  0,7  °С,  settlement  hydraulic  resistance  15  kPa.  The  executed calculations have shown, that at association of several heat exchangers in one installation it is expedient to connect them consistently on a product.